From: Phrogz <phrogz@...>
Date: 2007-11-08T01:10:03+09:00
Subject: Re: Language Popularity - PHP vs Ruby?

On Nov 7, 8:14 am, Vasyl Smirnov <vasyl.smir...@gmail.com> wrote:
> On Nov 7, 1:11 pm, Alex Young <a...@blackkettle.org> wrote:
>
> > Am I wrong in thinking that mod_ruby runs all scripts in the same
> > interpreter, so they all share a namespace?
>
> The following:
>
> page-a.rb
>
> #!/usr/local/bin/eruby
> <%
> class Foo
>   def bar
>     puts "Page A: Foo#bar<br>"
>   end
> end
> def baz
>   puts "Page A: baz<br>"
> end
> Foo.new.bar
> baz
> %>
>
> page-b.rb:
>
> #!/usr/local/bin/eruby
> <%
> class Foo
>   def bar
>     puts "Page B: Foo#bar<br>"
>   end
> end
> def baz
>   puts "Page B: baz<br>"
> end
> Foo.new.bar
> baz
> %>
>
> works just fine.

Yes, it would, but that could be because each file runs over the other
one.
For example:

C:\>type t1.rb
class Foo
  def bar
    puts "Page A: Foo#bar<br>"
  end
end
def baz
  puts "Page A: baz<br>"
end
Foo.new.bar
baz

C:\>type t2.rb
class Foo
  def bar
    puts "Page B: Foo#bar<br>"
  end
end
def baz
  puts "Page B: baz<br>"
end
Foo.new.bar
baz

C:\>irb
irb(main):001:0> load 't1.rb'
Page A: Foo#bar<br>
Page A: baz<br>
=> true

irb(main):002:0> load 't2.rb'
Page B: Foo#bar<br>
Page B: baz<br>
=> true

irb(main):003:0> load 't1.rb'
Page A: Foo#bar<br>
Page A: baz<br>
=> true


Obviously that's all in the same namespace/interpreter, but you don't
see a problem. Instead, try something like this:

C:\>type t1.rb
p @foo ||= 'page 1'

C:\>type t2.rb
p @foo ||= 'page 2'

C:\>irb
irb(main):001:0> load 't1.rb'
"page 1"
=> true

irb(main):002:0> load 't2.rb'
"page 1"
=> true